Thursday 1 May 2014

Historical - Places I've been, Forest Creek, Chewton, Victoria.


Forest Creek, Chewton, Victoria. -37.079266, 144.260201. The outcrop in question is located in the northwest of this image, in the creek bed.

Geological map of the area in question. The outcrop is either Castlemainian Zone 1 or Chewtonian Zone 1+2 (Castlemain Chewton Goldfield map, C.E. Willman 1994)

 Partial outcrop facing South. This is the western most fold of a three fold section. The northern outcrop is pretty cool too but I don't have any large scale shots.


The outline of the structure not shown in the photograph. Boxes show the location of the closeups that follow. Eastern most, Big then Central.


 Two ideas for this set of crenulations: 

Option 1 - Not a F2 syncline, a F1 recumbent fold in the limb of the anticline.




Option two - The limb photographed has been progressively tightened by continued orogeny. 
S1 cleavage is rotated as western limb is tightened, later overprinted by upright cleavage (S1.5) due to ongoing compression..


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